Guest essay by John Goetz As noted in an earlier post, the monthly raw averages for USHCN data are calculated with up to nine days are missing from the daily records. Those monthly averages are usually not discarded by the USHCN quality control and adjustment models, although the final values are almost always estimated as…

An analysis of the U.S. Historical Climatological Network (USHCN) shows that only about 8%-1% (depending on the stage of processing) of the data survives in the climate record as unaltered/estimated data. Guest essay by John Goetz A previous post showed that the adjustment models applied to the GHCN data produce estimated values for approximately 66% of…

Guest essay by John Goetz As noted in an earlier post here, approximately 66% of the GHCN record is estimated after processing by the GHCN adjustment models. In the current GHCN data set, there are 226 unique country codes represented. Following are the top and bottom stewards of temperature data, by country, based on the…

Summary of GHCN Adjustment-Model Effects on Temperature Data Guest essay by John Goetz As the debate over whether or not this year will be the hottest year ever burns on, it is worth revisiting a large part of the data used to make this determination: GHCN v3. The charts in this post use the dataset…

Guest Post by John Goetz Adjustments to temperature data continue to receive attention in the mainstream media and science blogs. Zeke Hausfather wrote an instructive post on the Climate Etc. blog last month explaining the rationale behind the Time of Observation (TOBS) adjustment. Mr. Hausfather pointed to the U.S. Climate Reference Network (CRN) as a…

Guest post by John Goetz I read Judah Cohen’s opinion piece in the New York Times yesterday and could not decide if he was being serious or not when he concluded “It’s all a snow job by nature. The reality is, we’re freezing not in spite of climate change but because of it.” He had…

Guest post by John Goetz The GISStemp Step 1 code combines “scribal records” (multiple temperature records collected at presumably the same station) into a single, continuous record. There are multiple detailed posts on Climate Audit (including this one) that describe the Step 1 process, known affectionately as The Bias Method. On the surface seems like…

Guest post by John Goetz The GISS temperature record, with its various adjustments, estimations, and re-estimations, has drawn my attention since I first became interested in the methods used to measure a global temperature. In particular, I have wondered how the current global average can even be compared with that of 1987, which was produced…

Guest post by John Goetz As noted in the previous post, GISS has released their monthly global temperature summary for June, 2009. This month’s whopping anomaly of 0.63C is once again much higher than that of RSS, UAH, and even NOAA, which is the source of the GISS temperature data. Not only is the anomaly…

by John Goetz In what seems to be a script straight from a Monty Python classic, the good folks of Santa Coloma de Gramenet in Spain seem to have found a rather novel use for the dead: as a tool in the fight against global warming. From the TimesOnline November 28, 2008 by Graham Keeley…

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